For hollandaise sauce, in top of a double boiler or in a metal bowl over simmering water, whisk egg yolks, water and lemon juice until blended; cook until mixture is just thick enough to coat a metal spoon and temperature reaches 160°, whisking constantly. Remove from heat. Very slowly drizzle in warm melted butter, whisking constantly. Whisk in pepper. Transfer to a small bowl if necessary. Place bowl in a larger bowl of warm water. Keep warm, stirring occasionally, until ready to serve, up to 30 minutes., Place 2-3 in. water in a large saucepan or skillet with high sides. Bring to a boil; adjust heat to maintain a gentle simmer. Break 1 egg into a small bowl; holding bowl close to surface of water, slip egg into water. Repeat with 3 more eggs. , Cook, uncovered, 2-4 minutes or until whites are completely set and yolks begin to thicken but are not hard. Using a slotted spoon, lift eggs out of water. Repeat with remaining 4 eggs., Top each muffin half with a slice of bacon, a poached egg and 2 tablespoons sauce; sprinkle with paprika. Serve immediately.